Watch-regulator



L. BATON. Watch Regulator.

No. 235,940. Patented Dec. 28,1880.

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N. PETERS. PHOTOLITHOGRAFHER. WASHINGTON. D C.

UNITED STATES PATENT @rrrc a,

LEANDER EATON, OF WORCESTER, MASSACHUSETTS.

WATCH-REGULATOR.

SPECIFICATION forming part of Letters Patent No. 235,940, dated December28, 1880. Application filed October 24, 1879.

To all whom it may concern Be it known that I, LEANDER EATON, ofWVorcester, in the county of \Vorcester and State of Massachusetts, haveinvented certain new and useful Improvements in Watches andOhronometers; and I do hereby declare the following to be a full, clear,and exact description thereof, reference being had to the accompanyingdrawings, which form a part of this specification.

My invention relates to an improvement in the means for regulatingwatches and chronometers.

1n the ordinary regulator the hair-sprin g is held firmlyin thehair-spring stud andvibrates freely between two pins attached to anadjnsta ble arm, and this arm is moved back and forth in a circle atwill by means of a lever termed an indicator, which extends along thebridge.

Heretofore in regulating a watch it has been customary, either by handor suitable mechanism, to move this indicator to the right orleft, asthe case may require, and practice has shown that the regulation of awatch by this means is simply a series of experiments or guess work, andthat it may take a number of weeks of close observation to secureaccurate time.

The object of my invention is to provide a means for the prompt andready regulation of a watch-movement to the keeping of accurate time,whereby the distance the sight is to be moved and the exact positionitshould occupy may be calculated with mathematical accuracy, and the lossof time, expense, and inconvenience of delay may be avoided.

My invention consists, first, of a method of regulating a watch-movementby taking the fast and slow time, respectively, at two positions of theindicator, and ascertaining the amount of both times, and taking thefraction of one as to the whole, and ascertaining with it the relativeproportion of the whole distance between the two positions of theindicator as the position the indicator should occupy for the movementto give correct time.

My invention further consists of an indicator for a watch-movementhaving a movable index-plate or any equivalent operated in connectionwith an indicator.

In the accompanying drawings, Figure 1 is a plan view. Fig. 2 is asection taken upon the line m m of Fig. 1. Fig. 3 is a plan view of amodification. Fig. 4. is a section taken on the line a: 00 of Fig. 3.Fig. 5 is a plan view of a modification, and Fig. 6 is a section on line00 m of Fig. 5.

A is an index of a watch, and B represents the bridge, upon and to whicha curved frame, 0, is attached.

D is an index-plate attached to an arm, a, which extends down andbeneath the frame 0, and is connected witha long flat spring,E, on theinside of the curve of the frame 0. The spring E maintains sufficientfriction to preyent the movement of the index-plate, except upon thedirect application of a slight force. Across the top of the plate D is aline, b, which is a continuation of the line 0, which extends along thecenter of the indicator A, and on either side of the line b, a suitabledistance therefrom, are lines d c.

In regulating, a movement of the indicator toward the line (1 producesslow time, and the reverse movement of the indicator produces fastertime.

In regulating a movement with this device the operation is as followsPlace the central line, I), of the index-plate and the line 0 oftheindex in juxtaposition, and at the end of one hour compare the time andnote the variance from correct time in seconds, finding it to be, say,six seconds fast. Move the indicator to the line (I, and place the linein continuation of the line 0, and at the end of one hour compare thetime and note the variance from correct time in seconds, finding it tohe, say, two seconds slow. Manifestly,then,there is a dif ference ofeight seconds of time in the action of the movement made by moving theindicator from the line b to the line (1, six of which are fast and twoslow. Therefore six-eighths of the space between the lines I) and d(beingt-hat part of the space adjoining the line b) represents fasttime, and two-eighths of the space represents slow time. Hence, if theline upon the indicator be moved to a pointtwo-eighths of the distancefrom the line (1 toward the line I) the movement will give accuratetime.

What I claim as new, and desire to secure by Letters Patent, is-

1. In a regulator, an adjustable or movable index-plate, substantiallyas shown and despring, arm, and index-plate, substantially as scribed.shown and described.

2. In a regulator, an indicator havinga cen- In testimony that I claimthe foregoing I N r.

tral line for operation with aline orlines upon have hereunto set myhand. a movable index-plate, substantially as shown 5 and described.LEANDER EATON 3. In aregulator, the combination of abridge, Witnessesindicator and frame and indeX-plate,substan- A. M. LONG, tially as shownand described. 1 WM. G. HENDERSON. 1o 4. In aregulator, the combinationof a frame,

